Copula lucentia: New Mediterranean Box Jellyfish

New species profile · Last reviewed 22 August 2026

Copula lucentia is a box jellyfish formally described in 2024 from El Campello on Spain’s Mediterranean coast. The discovery was not made on a remote expedition. It came from re-examining animals in a heavily used sea where the cubozoan inventory had seemed settled.

How it was recognized

Researchers compared the Spanish specimens with the long-missing type specimen of Copula sivickisi, recovered after almost sixty years. Both share the genus’s adhesive pads and keyhole-shaped opening around the rhopalium, but their internal velarial canal patterns differ.

The “bird-beak” clue

In C. lucentia, the canal roots narrow toward the bell margin and carry one or two sharp, triangular canals. The describing team compared the outline to a bird’s beak. C. sivickisi has broader, rounded, multi-lobed canals described as paw-like.

DNA supported the anatomy

Mitochondrial and nuclear markers confirmed that the Mediterranean specimens were distinct. The same analysis suggested additional unrecognized diversity inside Copula. This is a useful case study in why a familiar shape and an old name are not the end of identification.

What is known about risk?

The formal description establishes the species; it does not support dramatic claims about lethality. Avoid handling any cubozoan, report unusual coastal observations to local marine scientists and seek medical help for severe or systemic symptoms after a sting.

Sources

• Fonfría and colleagues (2024): description of Copula lucentia
• World Register of Marine Species